Door lock



Patented July 9, 1946 vOFFICE DOOR LOCK Carl A. Hillgren, Los Angeles, Calif.

Application May 8, 1944, Serial No. 534,614

8 Claims.

My invention relates to a door lock, and particularly to one having a dead-locking mechanism.

One of the principal objects of this invention is to provide a door lock with the dead-locking mechanism which is particularly simple and eco-- nomical to manufacture, one having a minimum of simple operating parts, one which is positive in its action, and one which will not readily deteriorate or get out of order.

Another important object of this invention is to provide a simple and economically constructed clogging or dead-locking mechanism, and one which is simple and novel of operation.

An important object also of this invention is to provide a clogging or dead-locking mechanism whereby the outer portion of the main latch bolt may be directly locked against the bolt housing to prevent retraction or inward shifting of the latch bolt, until such clogging or dead-locking mechanism is released.

A further important object of this invention is to provide a novel and simple spring mechanism for urging the auxiliary or dead-locking bolt outwardly from the housing or beyond the door, and also for urging the dogging or dead-locking mechanism into engagement with the main latch bolt to prevent inward shifting of the same.

With these and other objects in view, as will appear hereinafter, I have devised a door lock of this class having certain novel features of construction, combination, and arrangement of parts and portions, as will be hereinafter described in detail, and particularly set forth in the appended claims, reference being had to the accompanying drawing, and to the characters of reference thereon, which form a part of this application, in which:

Fig. 1 is a transverse sectional view of the free edge of a door, showing my lock mounted therein, and the means for operating the same, a portion of the lock housing being shown in section to facilitate the illustration;

Fig. 2 is a sectional view thereof, taken through 2--2 of Fig. 1, and showing a portion of the front casing member broken away to facilitate the illustration;

Fig. 3 is a similar, but fragmentary sectional view thereof, with the section taken through 3-3 of Fig. 1; 1

Fig. 4 is an outer end elevation thereof;

Figs. 5 and 6 are sectional views thereofl taken through 5-5 and 6-6 of Fig. 1;

Fig. '7 is a fragmentary sectional view thereof, taken through 'I--1 of Fig. 1; and,

Fig. 8 is a similar but fragmentary sectional View of the lock similar to Fig. 1, but showing the auxiliary latch bolt in a retracted position and held in such position by the keeper for the main latch bolt.

My door lock is installed, in the cconventional manner, at the free edge portion of the door` designated D. The lock consists essentially of a latch bolt unit B and an operating unit K.

The latch bolt unit B is enclosed in a housing consisting of the main housing member I and the housing cover member 2 which are held together by a unitary screw 3. These housing members I and 2, when secured together, are cylindrical in shape, and t into a cylindrical bore D1 in the edge of the door. This housing may be secured in place by means of screws extending through holes in the plate Ia at the outer end of the housing I. If desired, the housing may be held in place only by means of the door spindle 4 extending transversely through the rear portions of both housing members I and 2. The cross-section of the spindle 4 is preferably segmental, as shown in Fig. 2, for the purpose to be hereinafter described. The diameter of the spindle is substantially that of transverse holes Ib and 2a at the inner ends of the housing members. Thus, the housing is held or secured in position Within the door. At the opposite ends of the spindle 4 are secured an outer knob 5 and an inner knob 6. The outer knob 5 being preferably provided with a key lock mechanism 1, shown diagrammatically in Fig. l. The knobs may be secured in position, if desired, -by or against escutcheon plates 8.

Within the housing is reciprocally mounted a main latch bolt I I and an auxiliary latch bolt I2, the former being shown as positioned near the outer side of the door whilev the latter is positioned nearer the inner side. The auxiliary latch bolt I2 is preferably semi-circular in cross-section and ts with its flat side against an inner at side of the main latch bolt II which is more than semi-circular in cross-section. Within and at the rear portion of the housing, and immediately behind the main latch bolt I I vis reciprocally mounted the bolt operating member I3. The operative connection with the latch bolt will be hereinafter described. The inner end of this operating member I3 is normally positioned in engagement with the forward flat side 4a of the segmental spindle 4.

The main latch bolt has a cut-out portion IIa at its inner end, providing at one side a portion or tongue IID which extends backwardly into a cut-out portion I3a at one side of the operating member I3. Thus, the main latch bolt and the operating member overlap each other.

Within the cut-out portion IIa is located a compression spring I4 which normally operates the main latch bolt and the operating member urging the former outwardly to its normal latching position, and the latter inwardly against the at side of the spindle.

Within the portion I3b of the operating member Il, which` is located along side the cut-out portion Il and which extends into the cut-out.

portion II, is a longitudinal slot I8 through which extends the screw l. y

A rocker Il is pivoted to the shank of the screw 3 and may be supported by its opposite ends which rest on flat faces ofthe walls forming the op posite sides of the slot llc. This rocker is shown as havingdiametrically opposed arms Il and II", the former extending into a transverse notch Il*1 in the outer wall forming one side of the longitudinal slot. The other and longer arm Ilb extends into a transverse notch IlI in the tongue or projection Il of the main latch bolt. AsL the operating member I is forced outwardly by the rotation ot the spindle 4, the shoulder, forming the inner side of the notch i3d, engages the short arms of the rocker I5 and forces the end of the longer arm I5, which isbent backwardly slightly against a corresponding shoulder forming the inner side of a notch II, thereby withdrawing or retracting the bolt.

The auxiliary latch bolt I2 has, at its inner;

ally extending or opposed lugs I2 which when y the auxiliary latch bolt is in its outermost position, as shown'in Fig. 1, engage a shoulder IId at the adjacent side of the latch bolt II, which shoulder is positioned at the inner end of the locking bolt portion and which is. at all times, located within the housing. At the same side of the main latch bolt is located a dogging member I6 which provides the dead-locking element for my lock. The rear portion ofsthe dogging member has a laterally and slightly angularly extended portion I63L which is fitted against a shoulder 2b of the housing member 2, and this end of the dogging member is held in this position by a. lug or prong 2" in the housing member 2. The opposite end portion of the dogging member is bfurcated, as shown best in Fig. 2, and the furcations, designated I6", are located at the opposite sides of the auxiliary bolt I2. When the auxiliary bolt I2 is in its retracted position, as shown in Fig. 8; thepends ofthe furcations engage the shoulder II'i of the main latch bolt.

The lugs I2b are located between the furcations and the mainlatch-bolt, as shown in Figs. 1 and 8. When the auxiliary latch bolt is in its outermostposition, as shown in Fig. 1, the lugs I2b hold the ends of `the furcations clear of the shoulder IId, but when` the lugs I2b are withdrawn inwardly, as shown in Fig. 8, the ends of the furcations are allowed to engage theshoulder lid, and thereby prevent retraction or inward shifting 0f the main latch bolt.

Between the inner end of the auxiliary latch bolt I2, and the outer side of the lateral extension IIa of the dogging member, is positioned a compression` spring I1, this spring being located by a lug or prong I2c at the inner end of the auxiliary latch bolt and the lug or prong 2c on the cover member 2, referred to above. The compression spring Il performs two functions, namely, that of urging the auxiliary latch bolt I 2 outwardly and of causing the dogging member I6 to be rocked about its inner end, urging the free ends of the furcations toward the latch bolt II and behind the'shoulder Ild thereof. For the purpose of causing rocking about such lateral extension I6, the latter portion is positioned at an angle, as described above and as shown best in Figs. l and 8.

When the door is closed. the main latch bolt vthe auxiliarylatch bolt is held in its inward position, as shown in Fig. 8. When in-the latter position, the outer or free ends of the furcations IO of the clogging member I8 are permitted to be shifted to the solid line position shown in Fig. 8, by the spring I'I. This prevents the inward shifting of the main latch bolt II from the outer end, such as by means which may be employed by an unauthorized person attempting to enter the room behind the closed door. If, however, the spindle 4 is rotated by either of the knobs, or the lock 'Iy in the outer knob 5, the operating member `I3 is forced outwardly. The initial outward movement of thev operating member causes a ridge I3, at the outer end of such operating member, to engage an inclined face I6 at the adjacent side and near the inner end of the dogging member, causing the dogging member to be rocked about its pivot or about the end of the laterally extended portion I 8, against the action ofthe spring I1, freeing the ends of the furcations from the shoulder II". Further rotating en'ort on the part of either of the knobs will cause the main latch bolt I I to be drawn freely inwardly by reason of the rotation of the rocker I5, mentioned above.v l

Though I have shown and described a particular construction, combination, and arrangement of lparts and portions, I do not wish to b limited to the same. but desire to include in the scope of my invention the construction, combination, and arrangement substantially as set forth inthe appended claims.

I claim:

1. In a door lock, a latch housing, a main latch member movably mounted therein, a retractor, an auxiliary latch member associated with the main latch member and adapted to be retracted therewith and also to ,beshifted inwardly independently thereof, a dogging member pivoted within the inner end of the housing adapted to be shifted by the movement of the auxiliary latch member, with its free end into dogging engagement with` the inner end of the main latch member, an operating member slidably mounted at the inner end of the housing and shiftable by the retractor, and a rocker pivotally mounted intermediate its ends within and on the housing and engageable at tisfopposite ends by the main latch member and the operating member, said operating memberengaging the dogging merriber whereby the free end of the latter is shifted from the path of movement of the main latch member to allow retraction of the latter.

2. In a door lock, a latch housing, a main latch member movably mounted therein, a retractor, an auxiliary latch member associated with the main latch member and adapted to be retracted therewith and also to be shifted inwardly independently thereof, a dogging member pivoted within the inner end of the housing adapted to be shifted, by the movement of the auxiliary latch member, with its free end into dogging engagement with the inner end of the main latch member, an operating member slidably mountedl at the inner end of the housing and shiitable by the retractor, and a rocker pivotally mounted intermediate its ends within and on the housing and engageable at its opposite ends by the main latch opposite the bolt receiving member and the operating member, the outer end of the operating member engaging the dogging member near its pivoted end whereby the free end of the latter is shifted from the path of movement of the main latch member to allow retraction of the latter.

3. In a door lock, a latch housing, a main latch member movably mounted therein, a retractor for retracting the latch member into the housing, an auxiliary latch member associated with the main latch member and adapted .to be retracted therewith by the retractor and also to be shifted inwardly independently thereof, a d0eging member pivoted within the inner end of the housing adapted to be shifted by the movement of the auxiliary latch member, with its free end into dogging engagement with the inner end of the main latch member, a single spring positioned between the inner ends of the auxiliary latch member and the dogging member for normally urging ejection of the auxiliary latch member and also engagement of the free end of the dogging member with the inner end of the main latch member, and means associated with the retractor for engaging the dogging member whereby the free end of the latter is shifted from the path of movement of the main latch member to allow retraction of the latter. l

4. In a door lock, a latch housing, a main latch member movably mounted therein, a retractor for retracting the latch member into the housing, an auxiliary latch member associated with the main latch member and adapted to be retracted therewith by the retractor and also to be shifted inwardly independently thereof, a dogging member pivoted within the inner end of the housing adapted to be shifted by the movement of the auxiliary latch member, with its free end into dogging engagement with the inner end of the main latch member, a single spring positioned between the inner ends of the auxiliary latch member and the dogging member for normally urging ejection of the auxiliary latch member and also engagement of the freeend of the dogging member with the inner end of the main latch member, and means associated with the retractor for engaging the dogging member near its pivoted end whereby the free end of the latter is shifted from the path of movement of the main latch member to allow retraction of the latter.

5. In a door lock, a latch housing, a main latch member movably mounted therein, a retractor,

an auxiliary latch member associated with the main latch member and adapted to be retracted therewith and also to be shifted inwardly independently thereof, a dogging member pivoted within the inner end of the housing adapted to be shifted by the movement of the auxiliary latch member, with its free end into dogging engagement with the inner end of the main latch member, an operating member slidably mounted at the inner end of the housing and shiftable by the retractor, a rocker pivotally mounted intermediate its ends within and on the housing and engageable at its opposite ends by the main latch member and the operating member, a spring normally separating the main latch member and the operating member, and a second spring positioned between the inner ends of the auxiliary latch member and the dogging member for normally urging ejection of the auxiliary latch member and also engagement of the free end of the dogging member with the inner end of the main latch 6. In a door lock, a bolt housing, a main and an auxiliary latch bolt mounted in and extending beyond one end thereof, a retractor for retractingl the bolts, the auxiliary latch bolt being also shiftable inwardly independently of the main latch bolt, a dogging member located longitudinally of the housing and pivoted at its inner end therein, the outer end of the dogging member being Ibifurcated, the inner portion of the main latch bolt having a. shoulder engageable either by the inner end of the auxiliary latch bolt or by the free ends of the furcations of the dogging member, a spring normally urging the ejection of the main latch bolt, and a second spring lying between the furcations of thev dogging member for normally urgingl the ejection of the auxiliary latch bolt, said auxiliary latch bolt, when shifted' an auxiliary latch bolt mounted in and extending beyond one end thereof, a retractor for retracting the bolts, the auxiliary latch bolt being also shift- -able inwardly independently of the main latch bolt, a dogging member located longitudinally of i the housing and pivoted at its inner end therein, the outer end of the dogging member being bifurcated, the inner portion of the main latch bolt having a shoulder engageable either by the inner end of the auxiliary latch bolt or by the free ends oi' the furcations of the dogging member, a spring normally urging the ejection of the main latch bolt, and a second spring lying between the furcations of the dogging member and between the pivoted portion of the latter and the auxiliary latch member, for normally urging ejection` of the latter and also for urging engagement of the free ends of the furcations of the dogging member with the shoulder of the main latch bolt.

8. In a door lock, a bolt housing, a main and an auxiliary latch bolt mounted in and extending beyond one end thereof, a retractor for retracting the bolts, the auxiliary latch bolt being also shiftable inwardly independently of the main latch bolt, a dogging member located longitudinally of the housing and pivoted at its inner end therein, the outer end of the dogging member being bifurcated, the inner portion of the main latch bolt having a shoulder engageable either by the inner end of the auxiliary latch bolt or by the free ends of the dogging member, a spring normally urging the ejection of the main latch bolt, and a second spring lying between the furcations of the dogging member and normally urging the ejection of the auxiliary latch bolt, said auxiliary latch bolt also lying between the furcations of the dogging member, the portion of the inner end of the auxiliary latch bolt engageable with said shoulder consisting of laterally extended dogs positioned between the furcations and the inner portion `of thel main latch bolt,- said dogs, when said auxiliary latch bolt is ejected, being capable of disengagingthe free ends of the furcations from the shoulder of the main latch bolt to allow retraction thereof by the retractor.

CARL A. HIILGREN. 

